Eddy current type multilayered coil for generating intense AC magnetic field

Abstract

In circular conductor plates having radial slits alternately stacked with spirally wound coils continuously connected in order and supplied with comparatively low frequency AC current, eddy currents generated in peripheral direction are concentrated along the radial slits around central holes of the conductor plates, so as to induce concentrated AC magnetic fluxes in those holes. As a result, an intense AC magnetic field can be efficiently obtained by a comparatively small driving AC current in comparatively low frequency range.

What is claimed is: 
     
       1. An eddy current type multilayered coil for generating an intense AC magnetic field, characterized in that eddy current generating conductor plates having respectively slits extended from central holes to peripheries and eddy current conductor coils formed individually of conductor strips wound in flat annular shape are alternately stacked together with radially cut annular insulator plates individually inserted therebetween, one ends of said conductor coils being connected in order with the other ends of the adjacent conductor coils, so as to form a continuous eddy current exciting conductor coil such as eddy currents individually generated in the conductor plates in peripheral directions by supplying an AC current through the continuous conductor coil concerned are concentrated around respective central holes along respective slits, so as to induce AC magnetic fluxes concentrated through the respective central holes.